Details Developed to create optimal bowl & brush application* A premium look is maintained all through processing Provides superior viscosity Clairol Professional Premium Crème Developer is a dedicated developer for exclusive use with Clairol Professional Premium Crème permanent haircolor. With a Deep Conditioning SOY4PLEX formula, Clairol Professional Premium Crème permanent haircolor is a nourishing, smoothing hair color. Available in 46 dependable, blendable shades that offers complete gray coverage, even on resistant gray. Creates the ideal consistency for bowl-and-brush application. *When mixed with Premium Creme shades Directions Use with Clairol Professional Premium Creme Haircolor in equal proportions, except when mixing with high lift blondes. With high lift blondes, mix a 2:1 ratio, developer to color. For professional use. Pro Tips To match or deepen color, use 10-volume crème permanente developer. To cover more than 30% gray, use at least 20-volume. To lighten natural hair color Levels 4-10 (Light Brown - Lightest Blonde): 1 Level - 10 Volume 2 Levels - 20 Volume 3 Levels- 30 Volume 4 Levels - 40 Volume 5 Levels - Double 40* Volume (When mixed with high-lift blondes) To lighten natural hair color Levels 1-3 (Black - Medium Brown): 1 Level - 20 Volume 2 Levels - 30 Volume 3 Levels - 40* Volume NOTE: For additional lift, formulate 1-2 Levels lighter than the desired Level. Ingredients WATER/EAU, CETEARYL ALCOHOL, HYDROGEN PEROXIDE, CETEARETH-25, PHOSPHORIC ACID, SALICYLIC ACID, DISODIUM PHOSPHATE, ETIDRONIC ACID.